/* 设备 */
@media (max-width: 768px) {
    .container{
        background-color: aquamarine;
    }
}
@media (max-width: 576px) {
    .container{
        background-color: aqua;
    }
}
.container{
    width: 100%;
    min-width: 800px;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #ccc;
}

.form{
    width: 600px;
    min-width: 400px;
    height: 400px;
    border: 1px solid #ccc;
    background-color: rgba(255, 255, 255, 0.5);
}

.form input{
    outline: 1px solid #000;
}
.form .form__group{
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    margin: 20px 0;
}

.form input[required] + label::before{
    content: '*';
    padding-left: 4px;
    color: red;
}
.form input{
    padding-left: 2px;
}

.form input:focus{
    outline: 2px solid #07a6f6;
}

.form input + label {
    color: red;
}